Early Septic Flesh are basically slightly doomy "melodic" death metal. Heavy metal-styled guitars and incidental keyboards are thrown about quite liberally. Borders on maudlin, surprisingly listenable, not essential by any stretch.

"Please To Kill" is Kreator's best album, so if you have any interest in the band, direct it towards this one, on which you'll find the solid hybrid of speed and death metal which was emerging at this time.

"Painkiller" is essentially Priest playing European-styled speed metal, while still retaining all the clichéd silliness you'd expect from heavy metal. Still, it's one of their better albums, even if irrelevant to metal by the time of its release.

I really like Absu. I'd say get Tara first, then if you like that get The Sun of Tiphareth, then if you're still hungry get The Third Storm of Cythraul. Those three albums are probably the only ones worth tracking down.